System of motor control.



'-Althongh the inverse varying oi the voltages oli-the i' ca titler andthe niain generatorimay'either incrse, de.-

' or maintain constant the voltage between the -niins and 9, inthe casehere described it is aumed I that the generator voltage rises iiister than the exciter.

voltage falls, thnssinii'iltaneously increasing the voltage bothbetween'the mains v7 and 8, andthe mains 7 and 9. This increase of voltage between the mains 7 mido tends-w increase the menge f the field c'oil'd ifs..

ofitheworking-motor considerably, and it is to get the .desired efect'on the field coil of the workingV motor that' Athe resistance 13- is used. The resistance 13 may be so motor is increased obtained.;4

` Ii the' load' is heavy the working. motor requires more power than themotor A.can furnish, and the current.

, so'that better commutation may be rising iii the primary ot transformer 5 lby reason of this hcav'ylad. the switch is -opened, thus inserting resistance 3 in thorotor circuit of motor A. The slip of motor A'fis therefore increased and the motor is-permitted to slowdown slightlyy thus allowing the ily-wheel C to giveup'some of the mechanical energy it has stored,

which energy 'helpsthe motbr\to drive'the generators B and E tosupply electrical energyat. thelate demanded by'themfom D fp drive its load'. ,The Speed which the motor D acquires'depends upon the'extent ofrnovement of the arm 14', the full .speed being reached when the arm 14 is, in itseltreme right position, when the .whole resistance 11 has been cut out ofthe generator field circuit B, and the 'entire resistances- 12and 13 into iheexcit'er and .mo-tor eld circuits respectively.'. As the arr'n 14 is moved backwards toward the left the reverse ofthe above action takes place; i. e. the voltage of B is decreased and the voltage-of Ejincreased to diminish the voltage applied to the ari'natureDl and, in the case here specifically described,the 'strength lof motor and con d, thus Blowing down the mom D-'by causing.

it. to ac't as agcncrator to supplycur'rent to the amature B, which now servesas a motor to help restore energy tothe fly-wheel C. There is a powerful braking effect on the working motor due'to -its acting'as a generator. The diminished current .in the primary of transformer 5 also causes thc solenoid switch 4to close', if it has not already closed, thereby increasing the speed of motor A so thatit may alsosuply energy to the iiy-wheelC.

In this descript'ion and ndthe claims I use the terms sense, and do` not wish tolimit "myself to exact inverse or direct proportion.

1 have described my invention in what I now`consider to be its preferred form, but many details in the precise arrangemeutshown and described may be val v "mo'tor which conslstsinsnpplylng the arin'l'tnreiot said o tor trom one source of current, supplying its'eld .qild 'two sources of current.

l motor'nnd the eicite'r all belngsupplied h he generator.

2. The method of regulatlng'tlie speed oL'an electric motor whichconsists inlenergizing the armature of said 'motor from one source of current, "energizingits lieldV jointly from said source of current and anotherv source ol' current -in' series, and varying the electromotive forces orsaidtwo .sources ot current inversely. l 3. The method of regulatlngf`the speed ot an electricv motor which consists -in energizingthe armatureot said 'Y I motor from one source of current,energ1zing its ield jointly from said source of current and another source of current, and varying the electromotivev forces of'sald two sources of current. V.

4. '.l`he method-ot regulating thespeed otnn electric motor which consistsinV supplying the armature of sold motor from one source -of current, s`upplying. lts eld jointly from said'source ofcu'r'rent and another sourceofcurrent,gand vdrylng the ele'ctromotive forces of snld two sources ot current inversely'. l 'n .frhe method or regulating fthe speed or an electric motolgwhlch consists in'supplylngthe armatureot said rnotor`i'romA one source of current,"supplylng its field jointly, from said source of current. and another-source` of current in' series, and varying the elect'romotivf.'for-cc of said first source of current; i -.6. The method o t regulating the speed of an .electric motor which consists'in energizin'gthearmature. of said motor, from one source ot current, energizing its ield jointly from said source current and. another 'source of current, andfvarylng the eiectromotive force of said first source of current. 1'

7. A system of motor control, comprising l motor, a source ot current supplying the armature ofsaid motor, a second 'source ofl current which *jointly with the' first source supplies-the' motor. iield confond 'means for yvsryinz; the elect motlve torce lof said ilrst source of current 'to vary the speed ot the motor.

8. A system ot inotor contcol, comprising` s motor, n

source of current supplying the armature o f sold motor, a second source of current which jointly withtherirst' source supplies the 4motor..i'leld. coil, and means'for vary-y ing the electromotive forces 'or saidtwo .sources ofcur- 9. A systeni of motor control, -compris'ing 1 motor, n source ot current supplying'th'e 'armature-ot said, motor,v a second' source or current-which Vjointly with the ilrst source supplies the motor field coil, and means for vary-' lng the eiectromotlvelorce's of said two sources of curi rent inversely.

10. A system of motor' control, comprising'l' motor,'a source'of .current supplying them-mature ot'said motor, a

second source-of current 4which jointly withthe first source supplies the motor field coil, and a controller for varying the eiectromotive torcesofl bo'th sources of current by a single movement.

11. A' sys-tem of 'motor control', comprising Amotor, n sourceor current supplying the armature'fot sold motor, a secondl source .of current which lointly with the first source supplies the motor tleld coll, anda controller so connected and arranged that within its limit 'of move ment -it can inversely vary tlle`electron-iotive forces of the two source'or current. 12. AIn combination, a generator, d motor snpplicd there-`" by, and an exciter, the eld windings otthegenerator and the motor being "energized bythegeneratori-and the e'xciterjointiy.

ljl.` In combination, a generaton'n motor supplied thereby, and an exciter, the de ld coils ot the generator and the' egclter 'being supplied by the ge nerstor nndthe 'exciter' '15. In combination, agenraton'a motor-supplied thereman 'and ont -f-rro i i l -generator supplying the armature of the motor, a second motor energized by the two generators jointly,'and. a controller-arranged, to vary the resistance of the iield feircnit of said main generator to vary the speed 'ot-the motor.

1T. A system ot'motor control, comprising a motor, a generator supplying the armature of thc ,motor,'a second generator assisting the first to supply the field winding of the motor, and m'ea'ns f or.varying vthe iield strengthot the first generator tbyary the motor. speed.

18. A; systemic! motor control, comprising a motor, a -generator supplying the armature ot the motor, a second generator assisting the first to supply theiieid winding of the' motor, and means torvarying the eid strength'ot the second generator to' vary'tbe motor speed.

19. A- system' o( motor control comprising a motor, a generatosupplying the armature ot the motor, a second' generator assisting'the first to supply thejield winding of the uot9r, and means for varying Vthe tield strengths of tbe two generators "tovary the motor speed.

v.!(). `A-syateniiot motor control, comprising n motor, a generator supplyingthearmature of the motor. a second generator as s'i'stln 'the first tosupply the field winding of the motorfa lmeans for inversely .varying the field strengths of the tvro generators. T Y

21. A system ofmotor control, comprising a motor, a

generator assisting the first` to supply the field winding ot the motor, anda unitary means for varying the iieid4 strengths of-"t he t wo generators. 1` Y 22. A system of -motor control, comprising a motor, a. generatoe/s/upplylng the armature of the motor, a second generator. assisting the tirstto supplyv the ie'ldgyvinding ot the motor,'and a unitary-means for inversely varyingthe l '.iieid strengths of the two generators.

' 23."A systemm'ot motor control, comprising a generator,- jnotor the armature of .which is exclusively supplied by l generator, a vsecond generator assisting the'.first t'o illy the field winding otrthe motory and means iior varyingfthefieldstrengths of the first generator and the motor.

24. A-'syifem ot motor control, comprising a generator, motor-the armature of which is exclusivelyl supplied by said generator, a second generator assisting the iirstlto supply the field winding ot'the motor, and means for vary. ing the iieid strengths of the second generator and the mdton 1,

'A system ofmotor control, comprising a motorfa generator supplying thearmature of the motor, a second generator assisting "*e first to supply the field winding of the motor, and va u. tary means for varying the field strengths ot the first generator andthe motor.

26. A system of moto-r control, comprising a motor, a generator supplying the armature of the motor, a second generator assisting the first to supply tne iield winding of! the motor, and'a unitary eau: for varying the iieldV strengths ottbc second generator'snd the motor.

27. A system ofv motor control, comprisinga4 generator, a motor 'the armature ot which is exclusively supplied by said' generatorI a second Agenerator assisting the first to 'supply th e iield winding ot the 'motonand'means for vary:- V 60:y ing the field strengths of the two generators and the motor.

2S.. A system of motor control, -cgmprising,a'motor, a

v geperator supplying the 4armature off` the-motor, a second geii'e'rator assisting the first to supply the iield winding ot theAv motor, and means lfor inversely varying the' field Astreugths of the tryo generators and also varying the field :strength ot the motor. 29. A system ot motor, control, comprising a main generator, a motor suppliedthereby, an auxiliary generator,-

fthe-field windings off-.the main generator and the motor -beinglenergiaed'by the two generators `iointly, and a -sin vgle`coll/itroiler arranged to vary the resistances ot the iield circuits ot said main generator and said motor. g

'30, 'A system of motor control, comprising a main gen# y erator, a motor supplied thereby, an' auxiliary generator,

the iield windings of both generators and vthe motor being energized by tile-two generators jointly, and a single con- -troller arranged to vary inversely the reslstancesctthe field circuits of said main generator and said motor.

3L "-aystem ot motor.control, comprislnga malngenlerator, amotor supplied thereby, an auxiliary genuini- 1 ses 811sA Y circuits 'of said motorand 'said auxlllary -,generator,

'erator.

.generator inversely thereto.

,permanently connected separatelybetv/eenfthe ti' -iield winding being connectied-betyveen the main generator and the auxiliary 'generator 'rr-1 r ,z8

the field windingsof both generators and the motor being energized by the twol generators jointly, andva' singleI controller arranged tq'yary the resistances ofthe field 'cir 'nits 'of said main generator-and said'auxiliary generator. y 432I A system' of rlflotor control, comprisl'ng'a-Ima erator, a motor supplied thereby, Van auxiliarygenerator,y the tield `windings ot both generators 'andtlxe' moto Abeing energizedY by the t'wo generators jointly,' an'dfa s'gle l controller arranged to vary inversely the'resistanceso'ftihe 33. A system ot motor control, comprising erator, s motor suppliedthereby, an,auxiliarygeneijator, the eld windlngsot the auxiiiarygene tor andthe,motor .deld circuits Otsaid generator and 'sa.idarxili `y gener-,190

being energized by the'tvvo gweneratorpjointlynanda inglel 95 controller-arranged rto vary t he -iesistarlcexs of.' the eid 34, A system of motor control, comprisinga main generator,.a motor supplied thereby, an auxiliaryy generaton the field windings 'ot both generators 'and theJnotor. lie- $100 ing energized by the.two generators joinly,',.an a Vgie controller arranged'to vary correspondingiyntheresistaxnces ofthe field-circuits ot said motor andsaidauxixlliarygenerator. I v j.

35.' A system o t motor control, comprising ama' erator, a 'motor supplied thereby, an auxiliary, generator, the field findings o! bo'th generators .and the motor being energised bythe two generatorsijointl'andla single controller arranged `to vs .ry tbe resistances otitbe `field circuitsofsaid generator, saidmotor and s'aidV auxiila glen- 11() 3d; A system ot motor control, comprising a 4"in ign. erator,v a motor supplied thereby, arr aulxiliiiry-lgenlerator, :se .seid windings or both generators .p ,tsvemocorieing energized by .the twogenerators io'intiLJia'nda"sing'llA troller arranged -to vary the` reslstances.. e: l 'cuiiaotsaid motor and aurillary ,generator spondingly and the resistance. of lthe'field 'circ 't' fs lri.- A system of' motor controhleomprising vlea` ds. .v 120 va" main generator and a motor, Ithearmatures ctwhichnare t "and second leads, an auxiliary` generator, merkmature of .which is connectedbetween,4 h

mey motor seid winding selling connected, be en bearer 125 and third leads, and means ,tor varyingtheelectx" tive force of the main generatorwtovvfvar'y .the 'spee'd 't the motor. l .f

38. A system ot motor control,comprlsi are connected separately between.,.the iirst y.and second leads, a'n auxiliary'vgenerator, the .armatnremt yvhlcbis connected between. the second andthird deuda, the o tor seid winding being connected between, me arpr Ymira va main generator and l. motor, the armature's oflwiilcb.l30

leads; and means forfvarylng the electrnmotive ,fQrceoili 135 the auxiliary generator to v'sry thejpeed otvthemotor." 39. A systemot motor-.contr9l,' comprisingv ltdg -a mo'tor and a main generator', .the otzyvlrivcii nre each permanently connected between the first andusond leads, an auxiliary generator, the ari natnre la connected between the secondan leads, .and means for varying -the'ele cith -ornotlive tor 40. A system of motor controLcomprls'ing't ree eads, a motor and a main generator,"the a rma'tues ot 'vvli'ichi are connected separately across the f rst d Second leads',

an auxiliary generator, the ar'matu'reot vvhicir'islcn- Ysaid generator andsald motor being connected across the rst and third leads,and fmeans Ior Avarying theeiectromotive forces ot said' main and'auxiliary generatorsxm 1605Y 4: sessie 41.. A system of motor control, comprising three leads. voltages of the two generators. and means for varying the clectromotive force of one of the generators to vary the a main generator and a motorthe armatures of which are cach connected separately between the first and second leads, an auxiliary' 'generator the armature ot which is connected between the second and'tiilrd leads. the field windings of said generator and said motor being connected between the first and t'hird leads, and means for varying the electromotive forces of said main and auxiliary gener- 43. A system`ot motor control, comprising three lends, n main generator and a motor, thekarmatures ot which are connected separately' between the first and second leads, an auxiliary generator the armature of which 'is connected between the second and third leads. the held windings of the motor and the exciter being connected 'between the first and third leads, and means for varya main generator and a motor, the armatures of which are connected separately across the first and second leads, an auxiliary generator, the armature of which is connected across the second and third leads, the field windings of the motor and both generators being connected across the first and third leads` and Ameans for varying the electrovmotive forces ofl said generators.

v4G. A system of motor control, comprising three leads, a main generator and a motor, the armatures of' which are each connected between the first and second leads, an auxiliary generator. the armature of which is connected between the second and third leads, the field windings of the motor and both generators being connected between the-first and third leads, and means for varying the electromotive forces 'of said generators inversely.

4i'. A system of motor control, comprising three leads. a main generator and a motor, tiie armatures of which are each connected between the first and second leads, an auxiliary generator, the armature'A of which is connected between the second and third leads, the field windings of some or all of said machines being connected between the first und third leads, and means for varying lthe electromotive force ot the auxiliary generator to vary the speed of tbe motor.

48. A system ofA motor control, comprising three leads, n main generator and al'moror, the armatures' of' which are each connected between vthe first 'and second leads, an

. auxiliary generator. the armature ot' which is connected 'between the second and third leads, the field windings of some or all of said machines being connected between the first and third leads, 'and means for varying the electrothe motor.

49. A system of motor control, comprising three leads, n main generator and a motor. the armatures of' which are connected between the first and second leads, an auxiliary generator. the armature of which isconneCted between the second and third leads, tbe field windings of some 'or all of said machines being connected between the first and third leads. and means for vnr, ing the elcctromotive forces of' the two generators to vary the speed of the motor.

3U. A, system of motor control, comprising three leads, n main generator and a motor, the armatures of which are encb connected between the first and second leads, an auxiliarygenerator. the armature of which is connected between the second and third leads, the field windings of some or all of said machines being connected between the first and third leads, and means for inversely varying the electiomotive forces of the two generators to vary the speed of the motor.

51. A systemoi' motor' control, comprisingr two generators and a motor. connections whereby the motor arma- .speed of the motor. r Y

52. A system of' motor control, comprising two generators and a motor, connections whereby the motor armature has alwaysimpressed thereon the voltage of but one of said generators, and the motor field circuit the sum ot the voltages of the two'generators, andv means for varying the electromotive forces of the two generators.

A system of motorcontrol, comprising two generators and a motor. connections whereby the motor armature has impressed thereon the 'voltage of but one o said generators` and the motor field winding the sum of' the voltagesof the two generators, and'means for varying the electromotive forces'ofthetwo generators inversely.

'54. A system of motor control, comprising two generators and a motor, connections whereby the motor armature has impressed thereon 'the voltage of.' one of said generators and the field windings of all of' said machines the stun of the voltages of the two generators, and means for varying the electromotive forces of said two generators.

A .system of motor control, comprising 'two generntors and a motor,4 connections whereby the motor armature has impressed thereon the voltage of one ot said generators and the field windings of all of said' macillnesthe snm of the voltages of the two generators, and means for varying the electromotive forces of said two generators` inversely., r

5G. A system -of motor control, comprising two generafors and a motor, connections whereby the motor armature has always impressed thereon the voltage otone- 'ot' said generators only and the field circuits of some or all of said machines the sum ot the voltages of the vtwo generators, and variable rcsistancsin the. field circuits'of said generators.

5T. A system of motor control, comprising two generators .anda motor. connections whereby the motor armature has impressed thereon the voltage'of one ot said generators and the field windings of some or all of said machines the sum ot the voitagesof the two generators, and inverselyvariable resistancesV in the field circuits of said two generators respectively.

5S. A system `of motor control, comprising two generators and a. motor. connections whereby the motor armature has impressed thereon the voltage of one of' said generators andthe field windings of some or ull of said machines the snm of the voltages of ftheltwo generators; and variable resistances in the field crcuitsjot said three machines. respectively. I l i fill. A system of motorcontroi, comprising twofgenerators and a motor, connectionswhereby 'the mo'tor'arniat'ure has impressed thereon the voltage ot one of said generators and the field circuits of some or all of said machines 'the sum of the voltages of the twogenerators, variable resistances in the field circuits of said' three machines respectively, and a single means for varying all of'said resstances. l' i l I 60.*A system of motor contri, comprising two generators anda motor. connections whereby the motor armature has always impressed thereon the voltage ot one ot' said generators only' and -the field circuits o( some or all of said machines the sumo! the `voltages of the two generatore,

and`variable resistances in the field circuits of said motor' undone of said generators.

6 1. A system of motor-control, comprising two generators and a motor, connections whereby the motor armature has impressed thereon the 'voltage of one otsald generators and tbe field windings of some` or all otsaid machines the sum ot the voltages ot the twogenerators. and inversely variable resfstances in the'field circuits of said moto'i and one of s aid generators.

52. A system 'of motor,v control, vcomprising'two generators and u motor. connections whereby the motor armature has always impressed thereon the voltage of one of said generators only and thejieid windings of some or all of said machines thesum'of the voltages ofthe two generators. and correspondingly variable reslstances inthe field circuits of said motor and one of said generators.

liti. in cmnbination, a source of power, two generators driven thereby. and a motor whose armature is supplied by above normal.

' generator assisting the first to supply the field winding motor, two generators driven thereby. a

3 4... A system oi motor controlfconiprising. n motor, a generatorsupplyng tlie armature of said motor, a second of saidymotoiya ily-wheel mechanically connected to said generators, and means for inversely vvarying 'the field strengths of vsaid two generators.

A system of motor control. comprising an induction ily-wheel on the l shaft of theindiiction motor` and a working motor whose l armature is supplied by one of said generators and whose field is supplied by the two'generators jointly.

66. A system of motor control, comprising an induction motor,A two generators driven thereby, a ily-wheel on the shaft ofthe induction motor. a working motor whose ar mature is supplied by one of said generators and whose Viield/ is supplied by the two generators jointly, and means for varying -toe 'field strengths of the working motor and one of said generators. j

6T'. A system'of motor control, comprising an induction' .'motor, two 4generators,driven therebjnla tiyaavlicelon the shaft o f the induction jnotor, a working motor whose ar- I mature is supplied by one of saidgenerators and whose ii'eld is supplied by the vtwo gnierutors jointly, and means for inversely varying the lieldl strengths of the working motor and one of said generators.

, motor, two generators driven thereby, a ily-wheel on the `shaft of the induction motor, a `working motor' whose armature Vis supplied by one of said generators and whose- 68. Al system of vmotor control, comprising an induction ficld'is supplied by the two generators jointly, and means ior correspondingly varying the. ield strengths of the workingv motorand one of said generators. 69'. A- system of motor control, comprising an induction motor, two generators driven thereby, a. {1y-wheel on the shaft of the *induction motor, a wolking motor whose arlmature is supplied by one of said generators and whose,

field is` supplied by the two generators jointly, and means for varying the iield strengths of said two generators.

70. A system of motor control, comprising an induction motor, two generators driven thereby, .Aa ily-wheel on the shaft of the induction motor, a working motor whose armature is supplied by one of said generators and whose field is supplied by the two generators jointly, and means p for inversely varying the field strengths of said two generators.

71.A A system ofimotor control, comprising an induction motor, two vgenerators driven thereby, a ily-wheel on the 'shaft of the induction motor, a working.' motor whose armature is supplied by one of said generators and whose' ield is supplied by the two generators jointly, and means for varying the field strengths of the two generators and the working motor. l

A72. A system ot motor control, comprisingan induction motor, two generators driven thereby. a fly-wheel on the yshaft of the' induction motor, a working motor whose armature is supplied by one of said generators andwhose field is supplied by the two generators jointly, and means for inversely varying the tield'strengths of the two generators and also varying the field strength of the `working motor.

In testimony whereof i aix my signature, in the presence oi. two witnesses.

WILLIAM H. POWELL.

Witnesses:

Gno. B. Seminar, Fimo J. Kisser. 

